.net framework webapi swagger 上传文件

参考：how to get swashbuckle to generate parameter type "form" for testing APIs that need a file upload? · Issue #120 · domaindrivendev/Swashbuckle.WebApi (github.com)

1.

public class ImportFileParamType : IOperationFilter
    {
        [AttributeUsage(AttributeTargets.Method)]
        public sealed class SwaggerFormAttribute : Attribute
        {
            public SwaggerFormAttribute(string name, string description)
            {
                Name = name;
                Description = description;
            }
            public string Name { get; private set; }

            public string Description { get; private set; }
        }
        public void Apply(Operation operation, SchemaRegistry schemaRegistry, ApiDescription apiDescription)
        {
            var requestAttributes = apiDescription.GetControllerAndActionAttributes<SwaggerFormAttribute>();
            foreach (var attr in requestAttributes)
            {
                operation.parameters = new List<Parameter>
                {
                    new Parameter
                    {
                        description = attr.Description,
                        name = attr.Name,
                        @in = "formData",
                        required = true,
                        type = "file",
                    }
                };
                operation.consumes.Add("multipart/form-data");
            }
        }
    }

2.SwaggerConfig中添加

c.OperationFilter<ImportFileParamType>();

3.controller

[ImportFileParamType.SwaggerFormAttribute("ImportExcel", "Upload Excel file")]
        [HttpPost]
        public async Task<ApiResult<List<object>>> ReadInProp()
        {

            if (HttpContext.Current.Request.Files.Count <= 0)
                return null;

            var uploadFile = HttpContext.Current.Request.Files[0];
            if (uploadFile == null || uploadFile.InputStream.Length == 0)
                return null;

            var ds = NPOIHelper.RenderDataSetFromExcel(uploadFile.InputStream, new[] { 0 }, 0);
            var dt = ds.Tables[0];

            List<object> objList = new List<object>();
            foreach (DataRow dr in dt.Rows)
            {
                objList.Add(new 
                {
                    Id = dr[0].ToString(),
                    Value = dr[3].ToString()
                });
            }

            return Success(data: objList);

        }